Air-heating furnace.



B. S. SHERIDAN,

AIR HEATING FURNACE.

APPLICATION FILED DEC. 20. 1916.

1,242,992., Patented Oct. 16,1917.

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AIR-IIEATING FURNACE,

To all whom z't may concern: 1

Be it known that I, BERT-SI (SHERIDAN,

"citizen of the United States, residing at Cleveland, in the county of'Guyahoga and State of Ohio, have invented 'certainnew and useful Improvements) in" Air-Heating Furfo i provide an air-heating"furnace'with agas burner of novel construction and to install "naces, of which the following is a specification. l I

My invention relates to airf-heating furnaces, andthe object of the invention is' to "the burner ina particularl'way to produce highly efiicient heating results, all as herewinafter shown and describedand ,111018 par ticularly pointed outin the claims.

In the-accompanying drawings, Figure l is a side view and vertical section of an'airheating furnace embodyingmy invention. "Figp2'is a front elevation andsectional view Ybfthe furnaceyand Fig. 3 is" across section on line Figpl. Figu'is yan enlarged sectional detailof the ruffle plate and mouth sneer thegasburnerfi f The introduction of gas'into many communities induces the residents to convert their solid-fuel furnaces into gas-burning furnaces, but to change the ordinary airheating furnace and fire-pot and grate; or

to install a gas burner in lieu of the firepot or grate, is an expensive proceeding, gen erally ineflicient in results, and wasteful of gas. My concept is to utilize the ordinary air-heating furnace without making a single change therein and install a gas-burner or pair of gas-burners in the ash-pit beneath V the grate of the furnace, and relating them in a particular way so that a blow-pipe flame will be directed and spread against the cast iron walls of the ash-pit at the very bottom a of the furnace directly adjacent the air-intake ducts. In this way I utilize the base of the stove withinthe drum of the furnace as the heat-transmitting medium and reserve the fire-pot for solid fuel and for which the fire-pot is especially constructed,

being of relatively greater thickness or provlded wlth an extra lining as compared wlth the base of the stove. Quick and etiicient radiating results are only obtainable by using relatively thin radiating walls, and the cast-iron ash-pit walls of the ordinary air-heating furnace are of this kind. Consequently, by arranging gas burners in the ash-pit to direct the flame against the side walls thereof and transforming the pit into I Specification of Letters Patent.

acombustion chamber I'utilizethe gas flame are still compelled to travel through the fire- Patented Oct. 16,1917. Application filed December 20, 1916." Serial No; 138,116. I

pot andusual discharge channels, and the 4 or casing 2 inclosing a furnace made of cast-metal sections, comprising a base or ashlire-pot" may still be used-to burnsolid Ina-j pit; section 3 havingverti'cal" walls 4: and" an I open front 5, and a superposed fire-pot 6 and dome section 7 having a stoking-entrance fordoorS and a draft flue and discharge pipe connection 9" extending through the casing 52. The fire-pot 6 is provided with suitable grate-bars 10 for burning solid fuel, and the bottom of the furnace has air intake ducts '12 at its bottom-and the top of casing 2 has a number of discharge openings 11 for air-distributing pipes 13, as usual. In fact, the

furnace asdeta-iled isrepresentative of the air-heating furnaces foundsin general use for-burning coal" and oth'ers'olid'fuels. To

ccnvertth'is furnace forb urning gaseous fuel i as well assolid fuel, I placea pair of gas burners within the ash-pit section 8," one opposite each side wall and near the bottom thereof! Each burner-consists of a tube 15 having a separate flaring head 16 aflixed upon the outer end thereof by a set screw 17 and connected to the gas nipple 18 of an angle valve 19 on the gas supply pipe 20. An apertured disk 21 at the front of head 16 serves to regulate intake of air and the mixing of air with the gas issuing from nipple, 18, and the combustible mixture is ejected from the mouth or inner end of the tube 15 against the ruffle-plate 22 affixed to the said tube by screws or other means, see

Fig. i. The said ruiiieplate 22 is a substantially fiat member having transverse ribs 23 over its surface and disposed opposite the mouth of the tube and also inclined upwardly relatively to said mouth, and the said ribs or corrugations 23 extend on.

straight parallel lines transversely of the open end of said tube to ruffle the gaseous mixture and produce a spreading flame and complete combustion. Moreover, the inner ends of the burner tubes are placed relatively near the cast-iron side walls a of the ash-pit 3, and the said ruffle or mixing plates are projectedtoward said walls with an upward trend or inclination so that the flame therefrom or from the gas dashed and spread thereon will be directed upwardly as well as transversely. The angular relations of the said plates to the sidewalls t is illustrated in Fig. 2, and the degree of angle and direction of the flame'may be changed by rotary adjustment of the plates on rotating the burner tube 15 more or less in the head 16 upon releasing the set screw 17, and such adjustments may thus be conveniently eflected from the front of the furnace without removing the burners from the ash-pit. 7

By using a pair of gas burners of the V vkind and in the way described, any ordinary air-heating furnace having an ash-pit and fire-pot for solid fuel may be converted into a practical gas-burning furnace by merely .insertingsaid burners through the open ash- ,pit door, and by using a setof angle valves distance fromthe sidewalls 4:. These'ashpit walls are thinner generally than the firepot walls and ,the impinging flames from v I Copies of this patent may he obtained for burners 14L heat them red very quickly, and the heat is radiated at the extreme bottom of the furnace where the cold air enters thereinto from the air ducts 12, thus utilizing the fulllength of the stove from base to dome for air heating purposes, because the and through the fire-pot and usual channels to the discharge pipe 9.

It Will be noticed that the rufl le plate 22 is substantially flat and gradually widened outward and so set as to extend across the open end of the tube 15 at an angle ofoab'out 15 degrees and so that all the gas will be dashed or driven against the same and broken up and mixed so as to make the combustion complete.

7 What I claim is:

1-. A hot air furnace having a fire-pot for solid fuel and a walled ash-pitubelow the same, in combination with a separate gas burner tube adapted to be projected into said ash pit and having a transversely corrugated and flaring dash plate in inclined position across the end of said tube and adapted to direct the flame laterally against the Wall of said ash pit, u 7

.2. A hot air furnace. adapted to use solid fuel and having a walled ash-pit in its bot- .tom, in combinationwith a set of gas burner tubesprojected into said ash-pit and having each a ruflied and flaring dash plate for the gas at its end, said plate starting immediately at the end of the tube and extending at an upward and outward inclination across said end to a plane above the same, and;

means to rotate saidtubes axially tov direct the flame against the wall of the ash pit,

Signed at Cleveland, in the county of Cuyahoga, and Stateof Ohio this 16th day f December, 1916. I products of combustion from the burners V I also .rise and pass between the grate bars A BERT sf'si-IEmDA five cents each, by addressing the Commissioner of Patents,

- Washington, D 0. 7 v 

